Geographic Location Relationships
Geographic Locations are clearly related to each other. At the very least, the boundaries of every Geographic Area are defined by the “Latitude”, “Longitude” and elevation of a set of Geographic Points. In addition, Countries are composed of one or more Principal Country Divisions. And so forth.
Geographic Location Relationship is shown in Figure 5-2. Note that there are three principle sub-types:
· Geographic Structure places “Colorado” in The United States, and “Edinburgh” in Scotland.
· Geographic Definition associates a Geographic Point—with its “Latitude”, “Longitude”, and, where necessary, “Elevation”—with a Geographic Area or a Geographic Solid to define the latter’s boundaries.